Patent US4313014A successfully refreshed from Google Patents.
US4313014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of cyclohexene
Assignee: Toray Industries Inc
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Filing: 1980-08-27
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Granted: 1982-01-26
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Expires: 2000-08-27
Abstract
Abstract In the separation of cyclohexene from a feed which contains cyclohexene and cyclohexane, the feed is contacted with a type X and/or type Y aluminosilicate zeolite, thereby adsorbing cyclohexene selectively on the zeolite, and then the zeolite which adsorbed cyclohexene is contacted with a trimethylbenzene to desorb cyclohexene.
Inventors
- 👤 Tsuneyuki Kondo
- 👤 Kishio Miwa
- 👤 Takehisa Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A process for the separation of cyclohexene comprising the steps of: contacting a feed which contains a mixture of cyclohexene and cyclohexane with a type X aluminosilicate zeolite which contains sodium cations, whereby cyclohexene is selectively adsorbed thereon, and then contacting said zeolite which adsorbed cyclohexene with at least one trimethylbenzene, whereby cyclohexene is desorbed therefrom.
Claim 2
Dependent Claim
56 words
A process for the separation of cyclohexene comprising the steps of: contacting a feed which contains a mixture of cyclohexene and cyclohexane with a type X aluminosilicate zeolite which contains sodium cations, whereby cyclohexene is selectively adsorbed thereon, and then contacting said zeolite which adsorbed cyclohexene with at least one trimethylbenzene, whereby cyclohexene is desorbed therefrom.
Claim 3
Dependent Claim
83 words
A process for the separation of cyclohexene comprising the steps of: (a) contacting a feed which contains a mixture of cyclohexene and cyclohexane with a type X aluminosilicate zeolite adsorbent which contains sodium cations, whereby a greater percentage of cyclohexene than other components of said feed is adsorbed on said adsorbent; (b) contacting said adsorbent with a desorbent which contains at least one trimethylbenzene, whereby cyclohexene is desorbed therefrom; and (c) re-using in step (a) said adsorbent which desorbed cyclohexene and adsorbed trimethylbenzene.
Claim 4
Dependent Claim
83 words
A process for the separation of cyclohexene comprising the steps of: (a) contacting a feed which contains a mixture of cyclohexene and cyclohexane with a type X aluminosilicate zeolite adsorbent which contains sodium cations, whereby a greater percentage of cyclohexene than other components of said feed is adsorbed on said adsorbent; (b) contacting said adsorbent with a desorbent which contains at least one trimethylbenzene, whereby cyclohexene is desorbed therefrom; and (c) re-using in step (a) said adsorbent which desorbed cyclohexene and adsorbed trimethylbenzene.
Claim 5
Dependent Claim
23 words
A process according to claim 1 or 2, wherein said trimethylbenzene is a member selected from the group consisting of 1,2,3-trimethylbenzene and 1,3,5-trimethylbenzene.
Claim 6
Dependent Claim
11 words
A process according to claim 3, wherein said trimethylbenzene is 1,3,5-trimethylbenzene.
Claim 7
Dependent Claim
43 words
A process according to claim 1 or 2, wherein said adsorption and desorption steps are carried out at a temperature in the range of 0° to 300° C. and at a pressure in the range of atmospheric pressure to 40 kg/cm 2 .
Claim 8
Dependent Claim
42 words
A process according to claim 5, wherein said adsorption and desorption steps are carried out at a temperature in the range of room temperature to 200° C. and at a pressure in the range of atmospheric pressure to 30 kg/cm 2 .
Claim 9
Dependent Claim
14 words
A process according to claim 1 or 2, wherein said zeolite contains sodium cations.
Claim 10
Dependent Claim
14 words
A process according to claim 1 or 2, wherein said zeolite contains potassium cations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |